package com.mmall.common;


import com.google.common.cache.CacheBuilder;
import com.google.common.cache.CacheLoader;
import com.google.common.cache.LoadingCache;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.util.concurrent.Exchanger;
import java.util.concurrent.TimeUnit;

/**
 * Created by lenovo on 2018-04-21.
 */
public class TokenCache {
    private static Logger logger=LoggerFactory.getLogger(TokenCache.class);
    public static final String TOKEN_PREFIX="token_";
    //LRU算法
    private static LoadingCache<String,String> localCache= CacheBuilder.newBuilder().initialCapacity(1000).maximumSize(10000).expireAfterAccess(12, TimeUnit.HOURS)
            .build(new CacheLoader<String, String>() {
        //默认数据夹加载实现，
        @Override
        public String load(String s) throws Exception {
            return "null";
        }
    });
    public static void setKey(String key,String value){
        localCache.put(key,value);
    }
    public static String getKey(String key){
        String value=null;
        try{
            value=localCache.get(key);
            if("null".equals(value)){
                return null;
            }
            return value;
        }catch(Exception e){
            logger.error("localCache get error",e);
        }
        return null;
    }
}
